locale = $locale; } public function getContent() { return; } public function getDefaults() { $defaults = []; if (null !== $this->locale) { $defaults['_locale'] = $this->locale; } return $defaults; } public function getRequirement($key) { if ('_locale' !== $key) { throw new \Exception(); } return $this->locale; } public function getRouteKey() { return; } }